144-core optical fiber cable splitting

Splitting a 144-core optical fiber cable involves organizing fibers into manageable groups, using splice closures or splitter cabinets, and optionally integrating passive optical splitters for subscriber distribution.

Splitting Methodology

A 144-core fiber cable typically contains 12 fibers per tube across 12 tubes. To manage this high fiber count, the cable is often divided into smaller groups of tubes, for example, 6 groups of 2 tubes each, resulting in 24 fibers per group. Each group can then be routed into a 19-inch splice or distribution box, where fibers are spliced or connected to adapters such as E2000 for further distribution . Heat can be used to straighten tubes before splicing, and protective tubing ensures fiber integrity during handling .

Splitter Cabinets and Closures

For large-scale deployments, 144-core fiber splitter cabinets or joint splice closures are used to house the splitters and manage fiber connections. Key features include:

• FTTH Splitter Cabinets: Designed for passive optical networks, supporting up to 144 subscribers, with fiber splicing, termination, storage, and splitting capabilities. They can be floor-mounted, wall-mounted, or pole-mounted and provide protection for fibers passing through metallic holes .
• Steel Fiber Distribution Cabinets: Modular design with plug-in splitters, dustproof, waterproof, and anti-corrosive. Supports both ribbon and non-ribbon cables, with clear labeling and flexible capacity expansion .
• 144-Core Splice Closures: Integrated units for splicing, splitting, and distribution, often with IP68 waterproofing, impact resistance, and mechanical sealing. They can accommodate 1x8 splitters and multiple drop cables, providing a secure termination point for feeder-to-drop connections .

Centralized vs Distributed Splitting

• Centralized Splitting: Splitters are located at a central office or cabinet, allowing flexible assignment of fibers to subscribers via jumpers. This approach simplifies maintenance and reconfiguration .
• Distributed Splitting: Splitters are placed closer to the subscriber, often in closures or pedestals. Once installed, fiber assignments are fixed, which can reduce fiber counts but limits flexibility .

Practical Considerations

• Maintain a minimum fiber bend radius of 40 mm to prevent signal loss .
• Use modular and labeled systems to simplify maintenance and future expansion.
• Ensure environmental protection for outdoor installations, including waterproofing, anti-corrosion, and anti-theft measures .
• Plan the split ratio according to network requirements, commonly 1x32 or 1x64 for PON networks .

By combining proper grouping, splice closures, and splitter cabinets, a 144-core optical fiber cable can be efficiently split and distributed to support high-density subscriber networks.